Mining-machine



(No Model.) i l y '/sheets-sheen 1'.

E, S. MGKINLAY'.

MINING MACHINE.

vPawntealvmr.31,1896.

Tsheets-sneet 2. E. S. MOKINL'Y.

MIN-ING MACHINE. X

Patented Mar. 3l

i @uw .w QM KNITW Y (No Model.)

AN DREW EJSRANAM. FHUTOUTHQWASHINGTONL.

7 Sheets-Sheet 3.

E. QS; MGKINLA'Y, MINING-MACHINE.. I

n 935 es 3 @LWL @any B. s. MOKINLAY. MINING MACHINE. v

Patented Marv. 31, 1896.

7 Sheets-Sheet 5. l

(No Model.) 7- Sheets-Sheet 6.

E. s. MGKINLAY. MINING MACHINE. No. 557,144. Patnted Ma,1.3l,1896.

m UU GRAHAM4 PMUTO-LITIIQWASHINGDN. D Cv (No Model.)

. 7 Sheets-Sheet 7. E. S. D/ICKIDUJY.l

MININGMAGHINE.

. Patented Mar. 31., 1896.

` Inventar' NCM,

Witnesses @wwwa/6h07,

AN DREW BGRANAM. PMUTC-LITHG-WASNI NGTON, D C.

NiTnD STATESV VPiYrENT OFFICE.

EDVARD S. lWICKINLAY, OF DENVER, COLORADO.

MINING-MACHINE.

VSl?ECIFICATION forming part of Letters Patent No. 557,144, dated March3l, 1896.

Application filed .Tune 15, 1889. Renewed August 30, 1895. Serial No.561,040. (No model.)

To all whom! it may concern:

13e it known that I, EDWARD S. MCKINLAY, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements in Mining-Machines, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

Figure 1 is a view, mainly in plan, parts being broken away, of amining-machine embodying my improvements. Fig. 2 is a longitudinalsection of the same. Fig. 3 is a rear end elevation. Fig. 4 is a planview of the main frame and the carriage. Fig. 4 is a section of that inFig. 4. Fig. 4b is a part of Fig. 4 on larger scale. Fig. 5 is anelevation of one of the side tubes, looking from the inner side. Fig.Gis an end elevation from the rear. Fig. 7 is an end elevation from thefront. Fig.v 8 is an edge of the cap which closes the rear end of theside tube. Fig. 9 is a longitudinal section of one of the side tubes,part thereof being broken away. Fig. 10 is a cross-section on the linex, Fig. 1. Fig. 11 is a rear end view of the piston and the partsattached thereto in Fig. 9. Fig. 12 shows in side view and incross-section one of the cross connecting-pieces which unite the sidetubes. Fig. 13 is a top plan view of one of the side bars of thecarriage. Figs. 14 and 14 show the same in side view and in section.Fig. 15 is a top view of one of the cutterbar shoes detached. Fig. 16shows one of the plates which connect the said shoe to the carriage.Figs. 17 and 18 show, detached,the bearing for the slack-removing shaft,one being a side view and Vthe other a top View. Fig. 19 is alongitudinal section of the engineplate. Fig. 2O is a longitudinalsection of one of the steam-cylinders. Fig. 21 is a transverse section.Fig. 22 is a top plan view of the engine-plate. Fig. 23 is a rear viewof part of the rear bar which supports the engine-plate. Fig. 24 is avertical section of that in Fig. 23. Fig. 25 is a top view, and Fig. 2Ga face view, of the carriage-bar which supports the front end of thecylinder-plate. Fig. 27 is a top view, and Fig. 28 a face View, of thebar which supports the adjusting devices. Fig. 29 shows in plan view aform of air-feeding devices. Fig. 29"L is an end view of the same. Fig.29" is a partial side view. Fig. 29shows in section a check-valve. Fig.30 is a vertical section of the four-way cock in Fig. 29. Fig. 31 is ahorizontal section of the same.

The machine shown comprises two main parts-namely, the stationary bedand a carriage iitted thereto and moving thereon and carrying thecutting apparatus, the engines, and the power-transmitting devices.

The bed is composed of the side parts A A, bottom cross-girts B B, topcross-girts B B', and longitudinal sills B2 B2. The side pieces A A inthe construction shown are tubular, in order that they may, in additionto being the longitudinal parts of the bed, be utilized for otherpurposes to be hereinafter set forth. Each is formed with an interiorcylindrical chamber and is preferably cast with projections for unitingthe connecting-girts, said projections, as shown, consisting oftransversely-extended webs a, longitudinal webs a', and perforatedbottom parts a2 belowthe parts A, and the transverse webs b,longitudinal webs b', and top parts b2, perforated at b3. There areseveral of these downward-extending projections a a d2 on the under sideof each part A at intervals along the same, as it is desirable to employseveral of the cross-girts B; but there need not be as many projectionsupward, one girt B' at each end of the frame being sufficient. Referencebeing made to Figs. 5, 6, 7, 12, 1, 21, and 3, the construction andarrangement of the features last described will be readily understood.

At the points where the parts A are provided with the projections justreferred to I prefer to thicken them, as shown at a4, Figs. l and 5. Thecross-girts B B may be duplicates of each other, and each is preferablyformed with the vertical flanges b4 and base part b5. The flanges fitagainst and are bolted to the parts a2 and b2, above described, and,moreover, they serve to greatly increase the strength of the connectingparts without any material increase in the amount of metal. Each of theparts Ais also formed or provided with a carriage-guide upon its innersurface. As shown, each is cast with inwardly-extending ribs or flangesc, furnishing a way O between them. 'lhese ribs or iianges c not onlyfurnish guides, but being more or less con- IOO tinuous longitudinallyalong the tubes, and preferably cast integral therewith, serve tostrengthen them and prevent them from twisting or bending. The metal ofthe tubes being necessarily thin to make the machine as a wholecomparatively light, the tubes are otherwise liable to be bent when themachine is being transported.

The carriage is constructed and fitted to the aforesaid parts asfollows: It has side guides and support-bars D, which, as shown, areangular in section, (see Fig. 14,) there being top and bottom flanges d,with an intervening recess d'. These bars iit into the ways at C. D' isa cross-bar joining their rear ends. At (Z3 the front end of each isprovided with teeth or ribs for holding the slack-removing shaft afteradjustment, as will be described. The front portions of bars D arejoined by braces D2 D2. (See Fig. et.)

The parts which have been described constitute the bed and the carriage,respectively, considered independently of the other parts.

In the present case `the carriage is advanced by means of air, water,steam, or other similar agent, the side pieces A of the bed being usedas cylinders for receiving said agent and applying its power; but I wishit to be understood that I do not limit all the features of the presentinvention to such a feed. For this purpose pistons E are placed in thecylinders at A, which pistons and the other parts incident thereto willbe more fully described below. At their front ends they are connected`with the carriage, preferably by means of the devices shown particularlyin Figs. 9, l5, IG, l, and 2.

F represents generally a shoe projecting from the piston E, to which itis united by the part f, it being formed also with the bearing part f,the socket-piece f2, the web f3, web f4, and the socket f5, there beingan aperture f for the cutter-bar and another at f3 for theslack-removing bar. Rivets or bolts at f7 fasten the piston to the partsf.

G G, Figs. 16 and 9, are plates fastened to the top and the bottom ofthe shoe F, each having an arm f, crossing the front end of acarriage-bar D, to which they are bolted. (See Figs. l and 4.) Then thepiston-rod E moves, it carries with it the bars D and` the carriage.

As said, the slack-removing shaft I passes through the apertures at f8in the shoes. It is held inbearing-bars I', each having a bearing i', aclamp-arm i", and an inclined arm i2, the inclined arm 2 having teeth orribs t3 to engage with these bars D. i4 is a slot in arm t", throughwhich the clamping-bolt 5 passes. By those devices the bar I, whichsupports the slack-removing chains, can be adjusted in the aperture f3.

l prefer to employ compressed air as the motive agent in the cylindersat A for moving the carriage and for obvious reasons. Each cylinder A isclosed at the rear end by a cap A5, and at the front end there is agland or stuffing-box at E2.

At the rear end the piston-rod E carries a piston-head at E', providedwith paekings of any ordinary or any preferred style. The piston shownis hollow, which, though preferable, is not essential. By having ithollow I am enabled to overcome difficulties which are experienced inusing feeding devices of this character. The air or other elastic agentnot only presses against the piston at E, but as it has access to theinterior of the pistonrod E it also exerts pressure through the wholelength of the piston and against the front interior surface thereof. Asa result, the force is applied near to the points of resistance and thetendency is to pull the piston-rod through the tube rather thaupush it.I overcome the tendency to strain, bend, or bind the piston-rod.

The air is admitted at the rear end of the tube through aperture j orapertures j and at the other end through apertures jg. J i is a pipethrough which the air enters at j. It is united to the four-way cock atJ which is also connected with the pipe J L J leading to the aperturesj?. The main inlet-pi pe is shown atj4 andthe exhaust at NVhen the valveis inone position, air is let into the rear ends of both cylinders J atonce and exhausted from the front ends. Uien it is in the oppositeposition, the air is exhausted from them and simultaneously supplied tothe front ends.

I provide a cushion for the piston-head on its return stroke in thefollowing manner: By examining Figs. I, 2, 9, 29, and 29" it will beseen that the aperture j is at such distance from the rear end of tube Athat the pistonhead can pass it. I prevent the air which lies betweenthe orifieej and the cap A5 from escaping,which air serves as thecushion. This is accomplished by check-valves at JG in a branch pipe J 7communicating with the orifcej. As the piston moves back and after itpasses the oriiice j it drives the valve Js against its seat and thecushioning air is retained. When the air is again let on for anotherthrow, it opens the valve J b', enters the cylinder and drives thepiston forward until the latter passes the orifice j, after which theair enters through its normal duet.

In order to save the comparatively large volume of air contained withinthe pistons E, I combine with them check-valves, as shown at e, Figs. land 9, each being so arranged that when the air is let into the cylinderit can, if of sufficient pressure, open the valve e and prevent theescape of air therefrom. Thus the piston, though hollow, is no moreexpensive to operate than one of the ordinary kind with solid parts.

Iwill now describe the parts secured to the carriage to actuate thecutters and the other operative parts of the machine.

The engines are mounted on a supplemental frame secured to the side barsof the carriage.

IIO

L L represent two engine-cylinders, preferably arranged, substantiallyas shown, in respect to the longitudinal lines of the machine,

- one being upon one side of the center line and the other upon theother side.

l-Ieretofore in machines at all resembling mine the engines have beenelevated and mounted at points above the plane of the cutter-bar, andthe power has been taken therefrom through a train of shafting andgearing extending down to the said plane.

One of the important objects of the present invention is to bring all ofthe parts of the machine into as small a compass (vertically) aspossible. I mount the crank-shaft in the horizontal plane of thecutter-bar, or substantially therein, and I can thereby applypower muchmore directly and effectively than in machines as heretoforeconstructed.

I provide what I herein term an engineplate, consisting mainly of therearward-extending parts L L', the rear cross part L2, theforward-extending parts L3 L3, and the front cross part L4. Preferablythese are all cast integral, and with them are also cast the cylinders LL and the bearings for the shafting. The crank-shaft T is mounted inbearings at Zland the chain-shaftVin bearings at FZ?, and in theconstruction shown in Figs. l to 3l an intermediate shaft U isused,which is mounted in bearings LL. The steam-chests M M are also castwith the cylinders L L, and after being bored and faced they areprovided with heads, rocking valves, and the other parts necessary,which, however, need not here be described in detail. The valves areoperated by eccentrics (shown in Fig. d3) on the crankshaft in anypreferred way.

The engine-plate L L2 L3 L4 is supported on the carriage by means of arear bar, generally indicated by N, and a front bar, similarly indicatedby O. The bar N is shown detached in Figs. 23 and 24- and shown in placein Figs. l, 2, and 3, it being formed with a main back bar n, end platesn with recesses a2, wherein the side bars D iit, and with a horizontalsupporting-flange n3. Upon this latter the engine-plate is bolted. (SeeFig. 2.) At the front end the part L4 of the engine-plate is bolted tothe bar O, (shown detached in Figs. 25 and 26,) it having the main crosspart o, end plates o with recesses 04, wherein are fitted the bars D,piston-rod apertures o2, guide-rod apertures o3, and set-screw apertureso5. Set-screws o6 pass through the latter and clamp the part O to theside bars D after adjustment. The bar O has a flange O to support theengine-plate. (See Figs. l and 2.)

R represents the piston rods passing through apertures o2 02, and tothem are clamped the guide-boxes r r, traveling on the guides RQ whichlatter are bolted, respectively, at their rear ends to ears ZG on thecylinders and have their front ends supported in the apertures o3 in barO. The wrist-pins of the guide-boxes are connected with the wrist-pinsof the crank-shaft T by means of the connecting-rods S. It will be seenthat by this arrangement of the parts I can obtain as long a stroke ofthe pistons as is necessary and yet reduce the distance between thecrankshaft and the cylinders, said shaft lying on that side of thecylinders opposite to the pistons. The power is taken from crank-shaft Tby spur-wheel t to wheelu on intermediate shaft U, from whence in turnit is taken by pinion u to the gear o on the chain-shaft V. The latteris connected by one or more driving-chains W with the cutter-bar, andone or more slack-removing chains X with the bar I.

The cross-shafting and all its parts lie in substantially the sameplane, each of the shafts being brought down and secured directly to thecarriage. Of course there can be some variation as to the positions ofthese shafts and yet attain more or less of the advantages which Iaccomplish. They could be mounted upon the top of the sliding guidebarsD; but it is desirable to have them low enough to permit 'the chains Wand X to readily pass into and out of the kerf formed under the coal bythe cutter-bar.

Although I have shown an intermediate shaft U, this can be dispensedwith, and the chain-shaft can be geared directly to the crank-shaft.

In order to provide for a longitudinal adjustment of the parts lastabove described, including the shafting and the engines, I employ across-bar I), (shown detached in Figs. 27 and 28,) which is bolted tothe carriage-bars D. It has a main part p, with end plates p to receivethe bolts, having also apertures at p2 for the screws Q and apertures atp3 to receive the ends of the pistons. The screws Q bear against theaforesaid bar O, and they are provided with wrench-heads q and locknutsq. By means of these (after the setscrews at o6 have been loosened) themotor parts of the machine can be adjusted forward or back on thecarriage, and after adjustment 'they can be locked in position by thesetscrew o6 and the lock-nuts q.

In order to give a strong bearing for the shafts U and V, I cast theengine-frame with enlargements of metal at L5, (see Figs. 19 and 21,)wherein the boxes are seated. I

Vhen the parts which have now been referred to are properly constructedand arranged, they can be so related to each other that there shall bebut little friction between the carriage and the bed; but in order tostill further reduce the friction use may be made ofantifriction-rollers. I have shown such rollers arranged to support thecarriage, they being indicated at bs and resting upon a track at B5,supported upon the cross-girts B. The track is V-shaped (convex) insection, and the rollers are also V-shaped, (concave.) )Vith these Icombine also vertically-arranged rollers b9, they being interposedbetween the side parts A of the bed and the carriage-bars D, beingseated in the grooves in the latter.

IOO

IIO

When the side parts of the bed are cylindrical, I prefer to have theserollers b9 formed with concave peripheries (see Fig. 4") to conform tomore or less of the said cylindrical surface. Thus not only is thecarriage provided with an antifriction-support and an antifrictionlateral fitting to the bed, but also, if it should tend to` be lifted atany point, it is resisted by the antifriction-rollers b9, the lowerparts thereof bearing upward more or less against the bed.

I do not wish this part of the construction to be limited to tubular orcylindrical side pieces on the bed, as the same ends can be attained ifan ordinary sidefranie or bed be employed.

In other respects themachine can bemore or less modifiedl withoutdeparting from the spirit of the invention. I do not limit myself to theuse of antifriction-rollers, and in some instances have preferred toconstruct the frames shown in Figs. l to Siwithout them, the side barsof the carriage being fitted directly to guides on the side bars of themain frame.

I have shown but one drivin g-chan for the cutter-bar; but many of theparts of the machine I have shown can be usedwhenaseries of chains areused to drivethe cutter-bar. Nor do I wish to be limited to the use of achain engaging directly with the cutterebar,

as i it is now well knownthat these cutter-bars guide, engines,engine-supports, power-shafting, and power-transmitting devices betweenthe engines and the cutting apparatus, each or all. So, too, themeansfor letting on and exhausting the air or driving agent can bemodified without departing from the remainder of the invention.

I amwvell aware of the fact that heretofore machines have beenconstructed wherein air was used for moving one part or another, and ofcourse I do not broadly claim such matter as my invention; but I believemyself to be the first to have so constructed, arranged, and combinedthe various parts of the frames of a mining-machine and to have somounted the continuallyadvancing cutting apparatus thereon that thelatter can be fed to its work and held there by the yielding pressure ofthe air. The circumstances of such work are radically different fromthose where the material to be operated upon is moved, or where a chiselcutting implement is reciprocated, as is the case where drill or cuttingimplements have been actuated by anything at all akin to the deviceswhich I have shown.

will be seen that (considering the whole of a cut as one operation) theair devices in my case do not operate for effecting reciprocation, butfor the purpose of holding the cutting apparatus firmly, thoughyieldingly, against the coal.

I-Ieretofore in mining-machines at all resembling mine use has been madeof positively-actin g devices for eifectin g the advancing of thecutting apparatusthat is to say, devices such as racks and pinions orscrewshafts and nuts or worms; VVith such feeds there can be no yieldingof the cutting apparatus should it strike against exceedingly hardmaterials, (such as sulfur balls orv niggerheads,)'which are constantlymet with in coal-mining, and as a consequence breakages of the cuttingapparatus or of the machine are constantly occurring. This is obviatedwith a construction ofA the character which I have shown.

I am alsowelll aware of the fact that drilling-machines have beenconstructed or proposed with parallel drill-rods and cylinders, thepiston-rods being connected to form an abutment anda bearing for adrill-shaft,which is fed longitudinally by hydraulic pressure toitswork. Sueha construction is shown in the patent to Allison, No.`145,77 5, dated December 23, 1873, and Il do not claim it as of myinvention; but my machine differs very materially from that of Allison.In mechanisms such as his a vertically-arranged frame is utilized tosupport the cylindersand the motor, the cutters being supported entirelyindependently of the cylinders and rotating in planes transverse to theaxis of the feed-tubes. The motor is mounted on the stationary frame,there being no carriage, save the connecting-braces for the pistons.There is, therefore, no necessity for strong braces connecting the endsof the cylinders. In my construction, however, the tubes or cylindersare utilized to form the side parts of the bed, there being bracesconnecting them, which must'be firmly secured to them in order to standthe strong reactionary thrust of the cutters, as well as the heavystrains, blows, and jars,which are experienced in moving the machinefrom place to place and jacking it in an operative position. Then, too,a-sliding carriage is employed, it reciprocating in guides secured tothe tubes and'carrying the engines or motors with it as it feeds forwardor recedes. The tubes withstand the downward and lateral thrust of thecarriage as it reciprocates without danger of cramping at any point,they furnishing long guides for the carriage -bars, which support thecutting apparatus, the said guides or ribs materially strengthening thetubes from bending or warping.

In such earlier construction as that of Allison the tubes were not onlynot parts of the bed or frame, properly considered, but they wereclamped to the frame in a way radically different from that which Ifollow, as clamping or connecting bars were formed in half parts, onehalf lying below and the other half IOC IIO

lying above the plane of the axes of the cylinder and bolted together atthat plane. I, on the contrary, avoid entirely the presence ofstationary parts in the path of the carriage not only from the plane ofthese axes above, but, on the other hand, in a plane considerably belowit. As a result I am able not only to have the lines of feed-pressure inthe plane of cut, and also support the carriage and its attached partsproperly in relation to that plane, but also have an unobstructed spacefor the free movement of the cutting apparatus and the power parts onthe carriage.

IVha-t I claim isl. In a mining-machine, the combination with thesliding carriage having the two side bars and cross-bars joined to forma quadrangular frame, the transverse cutting apparatus, and connectingdevices for uniting the cutting apparatus to the carriage, of thefeed-cylinders, and the pistons therein supplemental to thecarriage-bars, said pistons being united with the aforesaid connectingdevices substantially as set forth, whereby the cutting apparatus isconnected to the side bars and to the pistons, as described.

2. In a mining-machine, the combination with the carriage having theside supportingbars and cross-bars connected to form a quadrangularframe, the transverse cutting apparatus at the front end of the frame,the transverse power-shaft nearer the other end of the'carriage-frame,the devices supported on the carriage for removing the slack, thefeed-cylinders, and the pistons therein supplemental to said carriageside bars and connected with the carriage, substantially as set forth.

In a mining-machine, the combination of the cylinders, the cross-barsjoining the cylinders, substantially as set forth, whereby they form thelongitudinal parts of the bedframe, the ways formed upon or securedrigidly to the cylinders, the carriage iitted to the said ways, thecutting apparatus mounted across the front end of the carriage andhaving its bearings at or near the longitudinal lines of the sides ofthe carriage, and the pistons united to the carriage at points adjacentto the longitudinal lines of said bearings, substantially as set forth.

4. In a mining-machine, the combination with the carriage, the cuttingapparatus thereon, the power devices on and traveling with the carriage,the stationary feed-cylinder, the piston therein connected rigidly tothe carriage and always preserving the same relation thereto andprojecting through the cylinder toward the cutters and directlyconnected to their support,the cross-girts secured to the cylinder belowthe top lines thereof, and the longitudinal sills B2 which connect saidcross girts, arranged substantially as set forth.

5. In a mining-machine, the combination of the rectangular non-rotarysliding frame which moves horizontally and carries the cuttingapparatus, a stationary frame having longitudinal cylinders arrangedhorizontally upon the sides of the sliding frame to receive the downwardand lateral thrust of said frame and pistons within said cylindersconnected directly with the sliding frame and moving through the frontends of the cylinders directly toward the material to be cut,substantially as set forth.

G. In a mining-machine, the combination of the rectangularhorizontally-sliding nonrotary frame carrying the cutting apparatus, astationary frame having horizontal cylinders as supporting andconnecting means at the sides, said cylinders having longitudinal waysor guides secured thereto in which the said rectangular frame slides,pistons reciprocating through the forward ends of the cylinders, andconnected directly with the aforesaid frame, a cross-piece which rigidlyconnects the rear ends of the tubular connecting-pieces, and across-piece which rigidly connects the front ends thereof, whereby saidtubular connecting-pieces are joined from end to end to resist thethrust and pressure of the sliding frame, substantially as set forth.

7. In a mining-machine, the combination of the horizontal sidecylinders, the crosspieces which join together said cylinders to form astationary frame, a sliding rectangular non-rotary frame arranged in thehorizontal planes of the cylinders and having side bars respectivelysupported on said cylinders, a rotary cutter-shaft arranged transverselyto the cylinders, the chain-shaft on the sliding frame parallel to thecutter-shaft, the powershaft on the sliding frame transverse to thecylinders, and the pistons within the said cylinders and connected tothe sliding frame at points adjacent to the longitudinal lines of thecutter-shaft bearings, substantially as set forth.

8. In a mining-machine, the combination of the sliding frame, thestationary frame, a cylinder connected with the stationary frame, apiston within the cylinder provided with an aperture adapted to beopened to permit the passage of air through the pist-on, and a hollowrod secured to the piston and having its interior chamber arranged tocommunicate with the aperture through the piston, and having its frontend closed, substantially as set forth.

9. In a mining-machine, the combination of the sliding frame, thestationary frame, a tube, secured to the stationary frame, a pistontherein having an aperture adapted to be opened to permit the passage ofair, a pistonrod within the tube connected with the sliding frame andconstructed substantially as set forth with an interior air-chamberextending through the front end of the tube, the front end of saidchamber being closed, substantially as set forth.

lO. In a mining-machine, the combination of a stationary bed, thecarriage sliding thereon, the horizontally-mounted rotating cutter- IOOIIO

bar, the horizontally-arranged chain for driving said cutter-bar, theengines on the carriage, and the crank-shaft mounted upon the carriagesubstantially in the horizontal plane of the cutter, whereby the powercan be imparted from the engines on substantially direct lines to saidbar, and the chain can throughout its length lie in substantially thehorizontal planes of the kerf, as set forth.

11. In a mining-machine, the combination of the stationary bed-frameyhaving longitudinal guides, the carriage havin g side bars slidingtherein, the transverse cutter-bar mounted in the ends of the said sidebars, the engine on the carriage, the rearward-extending chain, thechain-driving shaft and the crankshaft geared together and both situatedin the horizontal planes of the cutter-bar, substantially as set forth.

12. In a mining-machine, the combination of the carriage, the bed-framehaving a guideway to hold the carriage from vertical displacement, thecutter-bar mounted in the horizontal planes of the path of the carriage,the cutter-bar-driving chain, the chain-driving shaft mountedsubstantially in the planes of the kerf or cut, a second shaft mountedsubstantially in the horizontal plane of the chain-driving shaft, andthe prime powershaft geared to the said second shaft, substantially asset forth.

13. In a mining-machine, the combination of the carriage the bed havinglongitudinal guides to prevent displacement of the carriage, the plateor bearing support on the carriage between and below the upper lines ofthe side parts of the bed, the chain-driving shaft mounted on saidplate, the cutter-bar mounted on the carriage in the horizontal planesof the said chain-driving shaft, the chain extending from the cutter-barto its driving-shaft and lying in the planes of the kerf or cut, thesecond driving-shaft mounted on the said carriage-plate below the topline of the bed and geared to the chain-driving shaft, and the primepower shaft having speed-reducing gearing connecting it to the saidsecond shaft, substantially as set forth.

1-1. In a mining-machine the combination with the sliding carriagehaving two main side bars, the stationary bed for said carriage havingside parts which extend above and below the carriage, and the cuttingapparatus on the carriage, of cross-girts connecting the rear parts ofsaid carriage-bars, the engineplate resting upon and bolted to the saidcrossgirts and having depressions or apertures adjacent to the sidebars, the engine on the carriage, the crank-shaft mounted in or near thecentral horizontal plane of the machine and arranged to have its cranksrevolve in the said depressions or apertures, substantially as setforth.

15. In a mining-machine having a stationary bed, a carriage held by saidbed against vertical displacement, and a cutting apparatus on thecarriage, the herein-described com bined engine-cylinder andshafting-support consisting of the plate having the horizontalsupporting parts L2, L4, and the cylinders L cast integrallytogether,said plate portion being adapted to have the shafts mounted directlythereon, one or more in line with the cylinder axes, substantially asset forth.

1G. The combination with the carriage and the cutting apparatus thereon,of the feedtube, the piston therein, the hollow piston-rod connected tothe carriage, having an aperture communicating with the air-supply andan automatic valve therein whereby a constant pressure can be maintainedin said rod, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDXVARD S. lilcKINLAY.

Titnesscsz PERCY AUSTIN, JAMES R. Ivns.

